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How to remove an edge attribute in python-igraph

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2

I want to remove an edge attribute from a Graph object in python-igraph. The equivalent igraph R function is cleverly called delete_edge_attr. I haven't been able to find an equivalent function/method in Python... is there one?

If not, is there another way to do it? (I tried a simple g.es['edge_attr']= [] but this didn't work).

Example Code

g = ig.Graph.Tree(10, 2) #Generate random graph
g_betweenness = g.betweenness() #Calculate betweenness for graph
g['betweenness'] = betweenness #Assign betweenness as edge attribute
print(g.attributes())
g['betweenness'] = [] #Attempt to remove betweenness edge attribute (incorrect)
print(g.attributes())

Output

['betweenness']
['betweenness']

Desired output

['betweenness']
[]

python python-3.x igraph

share|improve this question

edited Mar 22 at 3:06

Josh

asked Mar 22 at 1:53

JoshJosh

409

add a comment | 

2

I want to remove an edge attribute from a Graph object in python-igraph. The equivalent igraph R function is cleverly called delete_edge_attr. I haven't been able to find an equivalent function/method in Python... is there one?

If not, is there another way to do it? (I tried a simple g.es['edge_attr']= [] but this didn't work).

Example Code

g = ig.Graph.Tree(10, 2) #Generate random graph
g_betweenness = g.betweenness() #Calculate betweenness for graph
g['betweenness'] = betweenness #Assign betweenness as edge attribute
print(g.attributes())
g['betweenness'] = [] #Attempt to remove betweenness edge attribute (incorrect)
print(g.attributes())

Output

['betweenness']
['betweenness']

Desired output

['betweenness']
[]

python python-3.x igraph

share|improve this question

edited Mar 22 at 3:06

Josh

asked Mar 22 at 1:53

JoshJosh

409

add a comment | 

I want to remove an edge attribute from a Graph object in python-igraph. The equivalent igraph R function is cleverly called delete_edge_attr. I haven't been able to find an equivalent function/method in Python... is there one?

If not, is there another way to do it? (I tried a simple g.es['edge_attr']= [] but this didn't work).

Example Code

g = ig.Graph.Tree(10, 2) #Generate random graph
g_betweenness = g.betweenness() #Calculate betweenness for graph
g['betweenness'] = betweenness #Assign betweenness as edge attribute
print(g.attributes())
g['betweenness'] = [] #Attempt to remove betweenness edge attribute (incorrect)
print(g.attributes())

Output

['betweenness']
['betweenness']

Desired output

['betweenness']
[]

python python-3.x igraph

share|improve this question

edited Mar 22 at 3:06

Josh

asked Mar 22 at 1:53

JoshJosh

409

g = ig.Graph.Tree(10, 2) #Generate random graph
g_betweenness = g.betweenness() #Calculate betweenness for graph
g['betweenness'] = betweenness #Assign betweenness as edge attribute
print(g.attributes())
g['betweenness'] = [] #Attempt to remove betweenness edge attribute (incorrect)
print(g.attributes())

['betweenness']
['betweenness']

['betweenness']
[]

share|improve this question

edited Mar 22 at 3:06

Josh

asked Mar 22 at 1:53

JoshJosh

409

share|improve this question

edited Mar 22 at 3:06

Josh

asked Mar 22 at 1:53

JoshJosh

409

asked Mar 22 at 1:53

JoshJosh

409

asked Mar 22 at 1:53

JoshJosh

409

1 Answer
1

active

oldest

votes

1

You might not be able to set it to an empty array, but your intuition about directly altering the EdgeSequence was already pretty good. You can simply delete the argument with Python's internal del(), I've included a minimal example below:

import igraph
# minimal graph
G = igraph.Graph()
G.add_vertices(2)
G.add_edge(0,1)

# add your property
G.es['betweenness'] = [1]

# print edge attribute (note the difference to your example)
print(G.es.attribute_names())
# output: ['weight']

# delete argument
del(G.es['weight'])

# print again
print(G.es.attribute_names())
# output: []

share|improve this answer

answered Mar 26 at 8:52

dennlingerdennlinger

1,98911024

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Perfect thanks! I knew there had to be a simple solution
  
  – Josh
  Mar 27 at 3:34
  

  
  
  
  

add a comment | 

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1

You might not be able to set it to an empty array, but your intuition about directly altering the EdgeSequence was already pretty good. You can simply delete the argument with Python's internal del(), I've included a minimal example below:

import igraph
# minimal graph
G = igraph.Graph()
G.add_vertices(2)
G.add_edge(0,1)

# add your property
G.es['betweenness'] = [1]

# print edge attribute (note the difference to your example)
print(G.es.attribute_names())
# output: ['weight']

# delete argument
del(G.es['weight'])

# print again
print(G.es.attribute_names())
# output: []

share|improve this answer

answered Mar 26 at 8:52

dennlingerdennlinger

1,98911024

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Perfect thanks! I knew there had to be a simple solution
  
  – Josh
  Mar 27 at 3:34
  

  
  
  
  

add a comment | 

1

You might not be able to set it to an empty array, but your intuition about directly altering the EdgeSequence was already pretty good. You can simply delete the argument with Python's internal del(), I've included a minimal example below:

import igraph
# minimal graph
G = igraph.Graph()
G.add_vertices(2)
G.add_edge(0,1)

# add your property
G.es['betweenness'] = [1]

# print edge attribute (note the difference to your example)
print(G.es.attribute_names())
# output: ['weight']

# delete argument
del(G.es['weight'])

# print again
print(G.es.attribute_names())
# output: []

share|improve this answer

answered Mar 26 at 8:52

dennlingerdennlinger

1,98911024

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Perfect thanks! I knew there had to be a simple solution
  
  – Josh
  Mar 27 at 3:34
  

  
  
  
  

add a comment | 

You might not be able to set it to an empty array, but your intuition about directly altering the EdgeSequence was already pretty good. You can simply delete the argument with Python's internal del(), I've included a minimal example below:

import igraph
# minimal graph
G = igraph.Graph()
G.add_vertices(2)
G.add_edge(0,1)

# add your property
G.es['betweenness'] = [1]

# print edge attribute (note the difference to your example)
print(G.es.attribute_names())
# output: ['weight']

# delete argument
del(G.es['weight'])

# print again
print(G.es.attribute_names())
# output: []

share|improve this answer

answered Mar 26 at 8:52

dennlingerdennlinger

1,98911024

import igraph
# minimal graph
G = igraph.Graph()
G.add_vertices(2)
G.add_edge(0,1)

# add your property
G.es['betweenness'] = [1]

# print edge attribute (note the difference to your example)
print(G.es.attribute_names())
# output: ['weight']

# delete argument
del(G.es['weight'])

# print again
print(G.es.attribute_names())
# output: []

share|improve this answer

answered Mar 26 at 8:52

dennlingerdennlinger

1,98911024

answered Mar 26 at 8:52

dennlingerdennlinger

1,98911024

answered Mar 26 at 8:52

dennlingerdennlinger

1,98911024